Merge branch 'master' of https://github.com/Gp2mv3/Syntheses
Merge branch 'master' of https://github.com/Gp2mv3/Syntheses
Merge branch 'master' of https://github.com/Gp2mv3/Syntheses
Merge branch 'master' of https://github.com/Gp2mv3/Syntheses
Merge branch 'master' of https://github.com/Gp2mv3/Syntheses
[Info Q3] reformulation issue
Fix : #101 info2 Q3
fix ortho
Merge branch 'master' of https://github.com/Gp2mv3/Syntheses
Merge branch 'master' of https://github.com/Gp2mv3/Syntheses
Merge branch 'master' of https://github.com/Gp2mv3/Syntheses
Displacement current : clarification
add babel to tikzlibrary

To prevent problems btw french babel and tikz packages
small correction in math q3
Wave equation (general introduction) and details

+ General expression of wave equation and propagation equations.
+ Solution of wave equation in particular cases.
+ Restructure EM waves : general properties and (after) derivation of
wave equation from Maxwell's equations.
+ Other details
Remove trailing spaces
Merge pull request #104 from alegat/master

[Info Q3] reformulation issue
Rephrase last ligne #104 - info q3
Merge pull request #108 from jdewasseige/master

correction in math q3 + add package in elec q1 + spelling
Rename PNG -> png #107 - physique q3